Inspection and Maintenance Schedule 1495. Pull the filter out of the water heater.6. Remove the filter from the plastic assembly and clean it with atoothbrush and clean running water.7. Allow the filter to dry completely.8. Reinsert the filter into the plastic assembly.9. Place the filter assembly back into the water heater and secureit with the screw.10. Replace the front cover.11. Reconnect the power supply to the water heater.12. Press the Power button on the front panel to turn on the waterheater.8.2 Annual ServicingIn order to maintain its safe and efficient operation, it isrecommended that the water heater is serviced annually.CAUTIONServicing must be performed by a qualified service agency orgas supplierInspection● Visual inspection for general signs of corrosion● Checking and adjusting the gas/air ratio● Checking Flue Gas● Carrying Out a Water Leak Test in Operation● Carrying out a gas leak test in operation● Checking Hot Water Temperature and Flow● Checking Noise● Checking venting systems● Checking the remote controllerMaintenance● Draining the water heater and cleaning the inlet water filter● Cleaning the Return Filter● Cleaning the intake air filter● Flushing the heat exchanger● Replacement of parts